In Wesberry v. Sanders, decided February 17, 1964, the U.S. Supreme Court held that Article I, Section 2 of the Constitution requires congressional districts within a state to contain roughly equal populations, so that “as nearly as is practicable one person’s vote in a congressional election is to be worth as much as another’s.”1Justia U.S. Supreme Court Center. Wesberry v. Sanders The 6–3 ruling struck down Georgia’s congressional map, which had gone unchanged since 1931, and produced the rule that still governs how every state draws its U.S. House districts today.
The Georgia Map That Started It
James P. Wesberry Jr. lived in Fulton County, part of Georgia’s Fifth Congressional District, which included metropolitan Atlanta. By the 1960 census, the Fifth held 823,680 residents. The Ninth District, drawn under the same 1931 statute, held 272,154. The average across Georgia’s ten districts was 394,312.2Library of Congress. Wesberry v. Sanders
Each district elected one representative. That meant a voter in the Ninth had roughly three times the influence over who went to Congress as a voter in the Fifth, and a representative from Atlanta answered to nearly three times as many constituents as a colleague from a rural district. Wesberry sued Governor Carl Sanders, arguing the arrangement debased his vote.
A three-judge federal district court acknowledged the “gross population imbalance” but dismissed the case, treating redistricting as a political matter for Congress or the state legislature to fix. Wesberry appealed directly to the Supreme Court, which had already signaled in Baker v. Carr (1962) that federal courts could hear these disputes on the merits.3Justia U.S. Supreme Court Center. Baker v. Carr
The Ruling and Its Constitutional Basis
Justice Hugo Black, writing for the majority, reversed. He grounded the decision not in the Fourteenth Amendment’s Equal Protection Clause but in the original text of Article I, Section 2, which provides that the House “shall be composed of Members chosen every second Year by the People of the several States” and apportioned “according to their respective Numbers.”4Library of Congress. Article I Section 2
Black read the phrase “by the People” as a deliberate choice made at the Constitutional Convention. The Great Compromise gave each state two senators regardless of size, but the House was designed to represent people in proportion to their numbers. From that text, the Court drew a concrete standard: population equality among congressional districts, as nearly as practicable.1Justia U.S. Supreme Court Center. Wesberry v. Sanders Georgia’s map, with a spread from 272,154 to 823,680, did not come close.
The Dissent
Justice John Marshall Harlan II dissented, joined by Justice Potter Stewart. Harlan argued that the Constitution assigned supervision of congressional elections to Congress, not the courts, and warned that the ruling “casts grave doubt on the constitutionality of the composition of the House of Representatives” and “places in jeopardy the seats of almost all the members of the present House.” On the history, he accused the majority of reading a modern principle into old text, writing that the Framers “did not surreptitiously slip their belief into the Constitution in the phrase ‘by the People,’ to be discovered 175 years later like a Shakespearian anagram.”2Library of Congress. Wesberry v. Sanders
Justice Tom Clark concurred in part and dissented in part. He agreed courts could review congressional districting but disagreed that Article I, Section 2 was the correct source of the equal-population rule.1Justia U.S. Supreme Court Center. Wesberry v. Sanders
What “One Person, One Vote” Means
The phrase most often attached to Wesberry is “one person, one vote,” though the opinion uses the longer formulation about each vote being worth as much as another’s.1Justia U.S. Supreme Court Center. Wesberry v. Sanders The principle targets vote dilution. If your district holds three times as many people as another, your representative is stretched three times as thin and your ballot carries a fraction of the political weight that a ballot in the smaller district carries.
The Court rejected the idea that geography, economic interests, or administrative convenience could justify population disparities between congressional districts. A rural voter’s ballot does not get extra weight because the land around them is sparsely populated.
What Wesberry Does Not Cover
The ruling reaches only congressional districts, and it draws its authority from Article I, Section 2. Later in 1964, Reynolds v. Sims extended one person, one vote to state legislative districts under the Fourteenth Amendment’s Equal Protection Clause.5Justia U.S. Supreme Court Center. Reynolds v. Sims The two provisions produce different levels of strictness in practice: congressional maps must aim for near-absolute equality, while state legislative maps get more breathing room, with deviations under ten percent generally presumed constitutional.
Neither ruling applies to the U.S. Senate. The Constitution guarantees two senators per state regardless of population, and the Court in Reynolds declined to disturb that structure.5Justia U.S. Supreme Court Center. Reynolds v. Sims
How the Rule Works Now
States redraw congressional districts after each decennial census to reflect population changes, using census data as the baseline for compliance.6U.S. Census Bureau. Congressional Apportionment The Supreme Court sharpened the standard in Karcher v. Daggett (1983), holding that there is no acceptable minimum population deviation for congressional maps. If a state could have narrowed the gap between districts through a good-faith effort and chose not to, the map fails.7Justia U.S. Supreme Court Center. Karcher v. Daggett
Once a challenger shows the state could have done better, the burden shifts. The state must justify each significant variance by pointing to a legitimate goal such as compactness, respecting municipal boundaries, or preserving prior district cores. None of those can excuse a gap the state simply chose not to close. In practice, modern congressional maps aim for population differences of fewer than a dozen people between districts.
When a legislature fails to produce a compliant map, federal courts can intervene. The common remedy is appointing a special master to draw new lines. Courts also set deadlines for legislatures to adopt corrected maps, with a court-drawn plan taking effect if the legislature does not act. That enforcement path is what gives Wesberry’s rule real force: a state cannot let a map sit through population shifts and expect it to survive judicial review.
Why the Case Still Matters
Before 1964, legislatures could let district maps stand for decades while populations moved around them, leaving urban voters with a fraction of the representation of their rural counterparts. Georgia’s 1931 map was hardly unusual. Wesberry told every state that congressional districting is subject to judicial review and that the Constitution demands roughly equal populations in the House.
The case also showed that the original constitutional text, not just the Fourteenth Amendment, could serve as a direct source of voting rights protection. Together with Reynolds v. Sims for state legislatures and Karcher v. Daggett for the precision required of congressional maps, Wesberry remains the controlling authority on federal redistricting more than sixty years after it was decided.